Fig. 1

Venom glands and reservoir of Bracon nigricans. Venom glands (VG) of B. nigricans tightly stick together around a muscular sac, the venom reservoir (Re) (a). When venom glands are separated (b), it is evident that they are in total 8, two of which are clearly larger. The helicoidal chitin layer that coats the reservoir cavity is clearly visible (a, b). Scale bars: 200 μm